Lady, Lady, I Did It!

My first McBain, but not my last. A quadruple homicide in a bookstore is investigated by a team of cops. Shades of Wahloo and Sjowall's The Laughing Policeman are present, but this came out years before. Supremely economical and efficient storytelling all in the service of what for me was an immaculately realized murder mystery/thriller. This could easily be bumped up to 5 stars if I read more and it turns out to be a standout of the series.